/**
 * 
 */
package com.demo2do.boyle.backend.service.report.impl.utils;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * Date related utilities
 * 
 * @author Jason.Y
 */
public class DateUtils {

	private final static SimpleDateFormat shortSdf = new SimpleDateFormat("yyyy-MM-dd");  
    private final static SimpleDateFormat longSdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    
    
    /**
     * 获得本月的开始时间，即2012-01-01 00:00:00
     * 
     * @return
     */
    public static Date getCurrentMonthStartTime() {  
        Calendar c = Calendar.getInstance();  
        Date now = null;  
        try {  
            c.set(Calendar.DATE, 1);  
            now = shortSdf.parse(shortSdf.format(c.getTime()));  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return now;  
    }  

    /** 
     * 当前月的结束时间，即2012-01-31 23:59:59 
     *  
     * @return 
     */  
    public static Date getCurrentMonthEndTime() {  
        Calendar c = Calendar.getInstance();  
        Date now = null;  
        try {  
            c.set(Calendar.DATE, 1);  
            c.add(Calendar.MONTH, 1);  
            c.add(Calendar.DATE, -1);  
            now = longSdf.parse(shortSdf.format(c.getTime()) + " 23:59:59");  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return now;  
    }  
    
    
    /** 
     * 当前季度的开始时间，即2012-01-1 00:00:00 
     *  
     * @return 
     */  
    public static Date getCurrentQuarterStartTime() {  
        Calendar c = Calendar.getInstance();  
        int currentMonth = c.get(Calendar.MONTH) + 1;  
        Date now = null;  
        try {  
            if (currentMonth >= 1 && currentMonth <= 3)  
                c.set(Calendar.MONTH, 0);  
            else if (currentMonth >= 4 && currentMonth <= 6)  
                c.set(Calendar.MONTH, 3);  
            else if (currentMonth >= 7 && currentMonth <= 9)  
                c.set(Calendar.MONTH, 4);  
            else if (currentMonth >= 10 && currentMonth <= 12)  
                c.set(Calendar.MONTH, 9);  
            c.set(Calendar.DATE, 1);  
            now = longSdf.parse(shortSdf.format(c.getTime()) + " 00:00:00");  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return now;  
    }  
  
    /** 
     * 当前季度的结束时间，即2012-03-31 23:59:59 
     *  
     * @return 
     */  
    public static Date getCurrentQuarterEndTime() {  
        Calendar c = Calendar.getInstance();  
        int currentMonth = c.get(Calendar.MONTH) + 1;  
        Date now = null;  
        try {  
            if (currentMonth >= 1 && currentMonth <= 3) {  
                c.set(Calendar.MONTH, 2);  
                c.set(Calendar.DATE, 31);  
            } else if (currentMonth >= 4 && currentMonth <= 6) {  
                c.set(Calendar.MONTH, 5);  
                c.set(Calendar.DATE, 30);  
            } else if (currentMonth >= 7 && currentMonth <= 9) {  
                c.set(Calendar.MONTH, 8);  
                c.set(Calendar.DATE, 30);  
            } else if (currentMonth >= 10 && currentMonth <= 12) {  
                c.set(Calendar.MONTH, 11);  
                c.set(Calendar.DATE, 31);  
            }  
            now = longSdf.parse(shortSdf.format(c.getTime()) + " 23:59:59");  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return now;  
    }  

    /** 
     * 当前年的开始时间，即2012-01-01 00:00:00 
     *  
     * @return 
     */  
    public static Date getCurrentYearStartTime() {  
        Calendar c = Calendar.getInstance();  
        Date now = null;  
        try {  
            c.set(Calendar.MONTH, 0);  
            c.set(Calendar.DATE, 1);  
            now = shortSdf.parse(shortSdf.format(c.getTime()));  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return now;  
    }  
  
    /** 
     * 当前年的结束时间，即2012-12-31 23:59:59 
     *  
     * @return 
     */  
    public static Date getCurrentYearEndTime() {  
        Calendar c = Calendar.getInstance();  
        Date now = null;  
        try {  
            c.set(Calendar.MONTH, 11);  
            c.set(Calendar.DATE, 31);  
            now = longSdf.parse(shortSdf.format(c.getTime()) + " 23:59:59");  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return now;  
    } 
	
}
